Electric hammer container



March 29, 1949. 1. w. CARSON ELECTRI C HAMMER CONTAINER 2 Sheets-Sheet l Filed July 5, 1946 INVENTOR. MDO/ff 6167,50#

/7/5 fr//fwf/ l. W. CARSON ELECTRC HAMMER CONTAINER A March 29, 1949.

2 Sheets-Sheet 2 Filed July 3, 1946 PmnadMmzs, 1949y ELECTRIC HAMMER CONTAINER Isadore W. Carson. Indiana. Pa., assignor to Syntron Company, Homer City, Pa., a corporation of Delaware Application July' 3, 1946, Serial No. 681,384

This invention relates generally to containers and more particularly to carrying cases for electric tools which require rectifiers for their operation.

The principal object of this invention is the provision of a carrying case provided with a compartment to receive an electric tool and another compartment containing a rectifier, a control and electrical connections for the operation of said tool.

vAnother object is the provision of a neat and compact carrying case for an electric tool carrying case and a rectifying circuit therefor.

Other objects and advantages appear in the following description and claims.

A prac-tical embodiment illustrating the principles of this invention is shown in the accompanyin'g drawing wherein:

Fig. l is a top plan view of the carrying case with the lid removed and the compartment partition partly in section.

Fig. 2 is a view in elevation of one end of the closed carrying case with thel articles therein indicated by dotted lines.

Fig. 3 is a view similar to Fig. 2 of the front of the case.

Fig. 4 is a view in elevation of the other end of the case showing the plug connections.

Fig. 5 is a circuit diagram of the electric tool.

Referring to the drawings the container I is a box having a hinged lid 2. The hinges 3 are of the loose joint butt hinge type as shown in Fig. l which permits the removal of the lid 2 when fully open. The casing I and lid 2 are preferably made of steel to provide the necessary strength or protection for the apparatus from heat, blows due to rough handling, or other possible sources of injury.

The front of the case is provided with the carrying handle 4 which is preferably stiff so as to permanently project beyond the lid latch members 5 and the control knob 6 and thus prevent them from being injured. The end of the box shown in Fig. 4 is provided with two plug connections, the recessed male plug member 1 and the flush female plug member 8. The male plug 1 has two prongs 9 and I0 in its recess and is arranged to receive a female plug member of an extension cord to connect to a source of alternating current. The female plug member 8 has three sockets II, I2 and I3 which are arranged to receive the corresponding male prongs I4, I5 and I6 which project from the plug I1 on the end` of the cable I8 that'is permanently connected to the electric hammer I9.

6 claims. (c1. 1v1- 97) The interiorI of the carrying case I is provided with a compartment adjacent the handle l which is enclosed by the arcuate partition 2I secured to the carrying case I by the screws 22.

This compartment is approximately one-half the height and one-third the depth of the case and extends for the full width thereof and would be square in cross section if the partition wall 2| were not formed in a radius. The plugs 1 and 8 are mounted in one end of the compartment 2l) and the rectifier 23 is secured in the other end. The rectiler shown comprises a stack of copper oxide, washers, spacers, cooling fins and pressure washers mounted on an insu` lated bolt which extends through a hole in one end of the carrying case and is secured thereto by the nut 24. The other end of the rectifier bolt is secured to the bracket that is fastened to the bottom of the carrying case I by the bolt 26.

The control knob 6 is mounted on the shaft of the rheostat 21. The tool illustrated as an electric hammer I9 has the handle 28 which contains the switch 29 and the barrel 30 which contains two coaxially arranged electromagnetic coils lwhich when alternately energized attract a. free core member made of magnetic material. This character of hammer illustrated is disclosed in Patent No. 2,354,723. The bit is inserted in the nose casting 3| of the tool when it is connected for use.

The larger compartment 32 within the carrying case I is adapted to receive the electric tool, some bits as indicated at 33 in Fig. 2, the tool cable I8, and an extension cord to connect the circuit with a source of supply. The partition wall 2I prevents these articles from interfering with the circuit and forms a shelf on which a part of the tool handle 21 is permitted to seat.

As shown in Figs. 1 and 5 the source of alterhating current is connected to the sockets 9 and I0 of the plug 1 and the socket 9 is connected by the wire 34 to the arm of the rheostat 21. If the knob is swung counterclockwise the arm engages the insulated button l35 and opens the circuit. When the arm engages the resistance wire of the rheostat and the hammer plug I1 is connected to the plug 8, currentilows from the rheostat 21 through the wire 36 to the center of the rectifier stack 23. The copper oxide washers are all stacked in one direction and the positive impulse of the alternating current then flows in the direction of the valve action of the copper oxide washers, and through the lead 31, the socket I2, the prong I5 to one end of the coil 38, and returns through the hammer switch 29, the prong I 6, the socket I3, the wire 38 to the amas socket I of the plug 1, and thence to the other side of the alternating current supply.

The negative impulse of the alternating current flows from the supply through the socket Ill of the plug 1, the wire 38, the socket I3, the

prong I8, the hammer switch 29 to the other coil 40 of the hammer and returns through the prong I4, the socket Il, the wire 4I to the other end of the rectifier stack and through the corresponding leg of the copper oxide washers, the wire 38, the rheostat 21, the wire 34, and the socket 9 of the plug 1 thus returning to the other side of the source of supply of alternating current.`

Thus each half cycle of the alternating current alternately energizes the tool coils 38 and 40 to rapidly reciprocate the movable core of the tool which strikes the bit once every cycle of the alternating current.

The carrying case thus provides a safe and compact container not only for the tool, its cable and the extension cord but also for the rectifier,

4 side wall and extending arcuately toward and the'control rheostat and the plug connections g to complete the circuit. A

I claim:

1. An electric hammer carrying case consisting of a container having a lid arranged to be fastened to enclose the container, a partition wall closing oi! one corner edge of the container to form a small enclosed compartment and a large open compartment with a shelf, a pair of electrical connecting plugs mounted in the small compartment and opening exteriorly of the carrying case, one of said plugs being arranged to be connected to a source of alternating current supply, a rheostat mounted in the small cornpartment and having a control knob exteriorly of the carrying case, a rectifier mounted in the small compartment, an electrical circuit connecting the plugs, the rheostat and the rectiiiers, said large open compartment for storing an electric hammer which is capable of being connected to the other of said plugs for operating the hammer.

2. An electric hammer assembly comprising a portable case 'provided with a lid, a partition within the case dividing the interior of the latter into two compartments, one of which compartments is arranged for storing an electric hammer when the latter is not in use, a rheostat mounted in the second compartment on the wall of the case with its operating shaft extending through the wall, and having a knob secured thereto a rectifier mounted in the second compartment, a pair of connector plugs mounted in the second compartment and protruding through the wall of the case, one of said plugs being arranged for connection with a source of alternating current and the other of said plugs for connection with the cable of an electric hammer, and an electrical circuit within the second compartment connecting the plugs, the rheostats and the rectifier arranged for operating the hammer.

3. An electric hammer carrying case consisting of a formed box made up of a bottom and four side walls, a lid arranged to close and be secured to the box, a carrying handle on the outer surface of one side wall, an arcuate partition wall secured to the inner surface of one fastened to the bottom of the box to form an electric hammer compartment and a service compartment, a rectifier and a rheostat mounted in the service compartment, a connection for supplying alternating current and a service plug mounted in the service compartment and opening through the wall thereof. and means to electrically join said connection and plug with the rheostat and the rectifier for supplying electrical impulses to a hammer when connected to a source of electrical supply.

4. An electric tool carrying clase consisting of a container having a lidarranged to be fastened to enclose the container, a partition wall closing of! one corner edge of the container to form a small enclosed compartment and a large open compartment with a shelf, a pair of electrical connecting plugs mounted in the small compartment and opening exteriorly o f the carrying case, one of' said plugs being arranged to be connected to a source of alternating current supply, a rectifler mounted in the small compartment, an

electrical circuit connecting the plugs and the rectiflers, a large compartment capable of storing an electric tool that may be connected to the other of said plugs for operating the tool.

5. An electric tool assembly comprising a portable case provided with a lid, a partition within the case dividing the interior of the latter into two compartments, one of which compartments is arranged for storing anI electric tool when the latter is not in use, a rectier mounted in the second compartment,` a pair of connections mounted in the second compartment and protruding through the wall of the case, one of said connections being arranged for connection with a source of alternating current and the other with the cable of an electric tool, and an electrical circuit within the second compartment joining ythe connections and the rectifier arranged for operating the tool.

6. An electric tool carrying case consisting of a formed box made up of a bottom and four side walls, a lid arranged to close and be secured to the box, a carrying handle on the outer surface of one side wall, an arcuate partition wall secured to the inner surface of one side wall and extending arcuately toward and fastened to the bottom of the box to form an electric tool compartment and a service compartment, a rectifier mounted in the service compartment, a supply plug on a service plug mounted in the service compartment and opening through the wall thereof, and means to electrically connect the plugs with the rectifier forsupplying the' electricity to a tool when connected to a source of electrical supply.

ISADORE W. CARSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re.- 19,816 Wurzbach et al Jan. 7, 1936 1,433,962 Meyer Oct. 31, 1922 

